API 520/521 Noise Calculation

[NG_Engineer]

I've got a question about the formula for estimating noise from a relief valve that is in API 521.

Has anyone done empirical testing to verify the accuracy of the estimate? I haven't been able to find anything about verification.

I wanted to use the formula to get a quick estimate of the noise produced by a pipeline blowdown valve. I believe it should at least get me a reasonable result, a blowdown is similar enough to a full open relief valve in this function.

I have heard about a NASA report that was published in 2001 called "A Reduced-Noise Gas Flow Design Guide" on here, and if anyone has a copy of the report and spreadsheet I would love to get a copy of it.

Also, if anyone has suggestions for a better way to estimate noise from a blowdown valve (reduced port ball valve, full port, plug valve, etc..) I would appreciate it!

Thanks.

 

[EmmanuelTop]

Any help from these?

http://frame.leser.com/engineering/file/EHB_en_file_6.5.4-Calculation-of-the-Noise-Emission.pdf

http://www.valve-world.net/pdf/SRV_psvnoise.pdf?resourceId=379

http://www.parcol.com.cn/docs/3-I_1-GB.pdf

Dejan IVANOVIC
Process Engineer, MSChE

 

[NG_Engineer]

Yes. Thank you for the response.

I talked to our SME for relief valves and he agreed that the formula should work for an estimate of the noise.